Charles brown thompson



U13- THOMPSON 1 BOBBIN WINDER PR SEWING MACHINES.

No. 282,412. 2 Patented July 81, 1888.

ments in Bobbin-`Winders;:and'I do hereby dethe bobbin-Winder securedf to me by Letters y trates the portion of said devices with the bob- August 16, 1881.

also to provide an improved spring-catch for `adjusting` said .screw the bobbin can be ad- Journal of the bobbin is formed inthe inner UNlTEnj STAES oHARLns Bnownl rnoM'rsoN, or sr. cATHAmNns, onrnmo, cannon.

fBoeBIN-wmoERfFoR sEwl Nel-MACHINES.

SPECIFICATION forming part of Letters Application led April 10, 18.82. (Model.)A

TOaZZ whom it may concern.-

Be it known that I,\CnARLns B. 'IrroMPr soN, a citizen of Canada, residing at the i'city of St. Catharines, in the-county ofLincoln, Province of. Ontario, andDominionof Canada, have invented certain new. and useful Improveclare the following to be a full, clear, and .eX-i actdescription thereof, reference being had to? the accompanying drawings, which-form a partl of this specification.

This invention relates to an improvement on Patent of the United States, which said Let! ters Patent are numbered 245,890, and dated The object of my present invention is to improve the construction of the presser-pad, and

engaging and holding` the presser-pad after the latter has been raised by the thread on a full bobbin, as hereinafter fully described.

Referring to the accompanying drawings, Figure lis a front elevation of the bobbin` Winder with a portion thereof shown in section. Fig. 2 is a vertical section taken on a plane at right angles to Fig. 1. Fig. 3` illustrates the position of the presser-plate and guide-plate and spring before the thread has been wound upon the bobbin. Fig. 4L illus'- bin full. Fig. 5 shows the combined presser and guide plate and its shank detached. Fig. I 6 illustrates .the bobbin. Fig. 7 shows one end ofthe drivingspindle. Fig. 8 shows the spring 3 which acts upon the shank of the combined presser and guide plate. l A indicates a suitably-formed bracket-plate, 'y which is adapted to be attached to the neck or other convenient part of a sewing-machine. A bearing for one of the bobbin-journals a is formed in a set-screw, B, adjustably secured in abearing on the bracket-plate, so that by justed longitudinally, for a purpose hereinafter specied. The `bearing for the remaining end of a rotary driving-spindle, O, which carries at itsouter enda friction-pulley, D, or a belt-pulley, as may be preferred. The rotary driving-spindle, which is also adapted to slide. longitudinally in its bearings, passes through Patent No. 282,412, dated Juiy 31, 18e?.

a hollow arm, E, on the bracket-plate, and is forced inwardly toward the bobbin and held against one of the heads of the latter by means of-a spring, F, arranged within the hollow arm. In order to insurethe rotation of the bobbin, the Adriving-spindle is provided with projec- "tions c, adapted to `fit into grooves a', formed inlone of theA bobbin-heads ai, Vas best shown 'in Fig. 6, so as to locktogether the bobbin and its driving-spindle.

The wheel D can be provided with anelastic facing and arranged to be driven by frictional contact with the hand-wheel of t-he scwinganachine, or it can be driven by belting, or in any other preferred way. i

G indicates a pivoted presser plate and thread guide or controller, which is adapted torbear upon the thread on the bobbin during the winding operation, so as to cause the thread to be wound insuccessive layers. This presser-plate and thread-guide is adjustably secured to the under side of its shank portion g by means of a set-screw, H,passing through a slot, h, in the plate and screwed into the by any other analogous` means.

shank; or the two can be adjustably connected The presser-plate and thread-guide are pivoted to the bracket-plate by means .ofA a pin or pins, I, supported in the sides of an opening, t', in the bracket-plate, and in turn supporting the shank g of the presser-plate, which said shank Apasses through the opening in the bracket-plate.V i, y

rIhe presser-plate G is provided with a curved front edge, G', over which the thread passes, and is held down upon the thread on the bobbin by means of a spring, K, which is adjustably secured at one end to the bracketplate, and at the other end adapted to bear upon `the heel of the shankv portion ofthe presser-plate. This presser-plate is adapted to fit between the end caps or heads, a2, of the bobbin, so that it can bear upon the layers of 9 5 thread as they are successively wound.

In order to prevent the thread which is be` ing wound from slipping over either side edge of the presser and guide plate as the thread arrives at" either end of the bobbin, I provide at each outer corner of this presser and guide plate a laterally-projecting tip, G2, the front edge of which constitutes a continuation of y the curved edge G of the presser and guide plate;

' bobbin is full, as in Fig-L, the presser and guide plate will be raised and the heel of the shank I brought in position to engage with said catch, and at this moment the winding should be stopped.

As illustrated in the drawings, the catch is formed by providing the' free end of the Vspring with a plate or enlargement, 7c, having a beveled .lower edge, k, vwith which the heel of the shank g engages. The plate k can be formed with the spring, or secured thereto, as

` desired; or the spring can be bent so as to form the said catch. This catch serves to hold the presser-plate up, so as to allow the removal of a full bobbin and its replacement by an empty ence to any size of bobbin by adjusting the spring K, which is slotted at its lower end and secured to the bracket-plate by a set-screw, K', passing through the slot and screwed into the bracket-plate.

By forming the presser and guide plate in two parts, as hereinbefore described, the action of'edge G of the same can be adjusted by adjusting plate G so as to ca'use the thread to be laid evenly, with layer upon layer, on the bobbin.

It will be seen that by adjusting the screw B, in which a bearing is formed for one of the bobbin journals, the bobbin can be shifted longitudinally, so as to adjust` it with reference to the presser-plate, and thereby bring the bobbin in such position that the presserplate will, when swung down, iit between the heads or caps lof the bobbin.

. L indicates a mill-headed screw which works in the upper end of the bracket-plate. rIhis screw has a vertical slit formed through its head, and a guide-eye, Z, for the thread,formed at the-bottom of said slit. By turning this screw so as to raise or lower its guide-eye Z ,the distance of the guide-eye from the presser and guide plate can be varied according to the radius of curvature of the latter; also,

This catchcan be adjusted with referby turning the screw slightly to the right or left the direction ofthe thread fromthe guide'- eye to the bobbin can be varied, so as to regulate` any imperfection in the winding of the thread on the bobbin.

M indicates a tension device located upon the upper portion of the back of the bracketplate, and adapted to produce a slight tension for steadying the thread in its passage from the spool to thebobbin. This tension device can consist of a cup-shaped disk or plate, fm, loosely arranged upon a set-screw, m, and caused to bear against the bracket-plate by means of a spring surrounding the screw between the head of the latter and the disk 5 but 7o any other preferred form of tension device can be employed.

It will be seen that as the thread is wound in successive layers upon the bobbin the presser-pad is raised, and that when the bobbin is full the spring-catch engages the shank portion of the presser-pad, thereby holding up the pad, and at the same time, by reason of its engagement with the heel of the presserpad, serving to indicate that the bobbin is full.

It will also be observed that there is -at the juncture just mentioned-that is to say, when the bobbin is full--a positive engagement of the spring catch with the shank portion of the presser-pad, so that the operator cannot fail, upon inspection, to notice such engagement.

In my former patent the presser-pad was provided with tips at two corners, said tips both projecting at right angles to the front edge of the presser-pad; but in the presentr instance the tips project laterally from opposite side edges of the pad.

Having thus described my invention', what 95 I claim is- The combination, with the pivoted presserpad G, having a body equal in width to the distance between the end caps of the bobbin, and provided with laterally projecting tips oo G2, which extend beyond the end caps, of the shank-piece g, having its end beveled, and the indicator-spring K, having the enlargement 7c, substantially as described.

Dated in the city of St. Catharines, Ontario, Canada, this 17th day of April, A. D. 1882.

, CHARLES BROVN THOMPSON.

In presence of- WM. CAMPBELL, J r., GEORGE C. ASHAW. 

